JPH0526272U - Bearing fitting tool - Google Patents

Abstract

(57) [Summary] [Purpose] To easily fit a bearing into a large diameter part of a shaft that has a large diameter part and a small diameter part for fitting the bearing in a short time without damaging the bearing. [Structure] An outer surface provided with a pressing surface 11b facing the end surface 5a of an inner ring 5 of a bearing fitted in a large diameter portion 2 of a shaft 1 at a front end portion and a hammering striking surface 11c at a rear end portion. The sleeve 12 is slidably fitted into the cylinder 11.
The sleeve 12 is provided with a hole 15 that fits into the small-diameter portion 3 of the shaft, and the base of the handle 14 that penetrates the elongated hole 13 provided in the cylindrical wall 11a of the outer cylinder 11 is fixed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tool for fitting a bearing into a shaft, and more particularly to a tool for fitting a bearing into the large diameter portion of a shaft having a large diameter portion and a small diameter portion for fitting the bearing.

[0002]

[Prior Art]

 Generally, it is necessary to remove the bearing of the axle of the automobile from the axle for a certain period of time or for each mileage, and after inspection and cleaning, insert it into the axle and lubricate it. As shown in FIG. 4, this axle has a large diameter portion 2 and a small diameter portion 3, and each one taper roller into which the inner ring is fitted in the large diameter portion 2 and the small diameter portion 3. The shaft 1 is generally configured to rotatably support a wheel hub (not shown) via bearings 21 and 22. When the bearing 21 is fitted, the end of the striking rod 23 is applied to the end surface of the inner ring 5 of the bearing, and the rear end of the striking rod 23 is hit by a hammer 6 to strike the inner ring 5. It takes a lot of time and time to adjust the striking force while changing the tip position of the striking rod 23 so as not to incline, and the eccentric load on the inner ring 5 is often shocked or once damaged. In some cases, the hand holding the striking rod 23 was accidentally hit. There is also a method in which, instead of the perforation rod 23, the tip end surface of a cylindrical driving tool is applied to the end surface of the inner ring 5 and the driving tool is hammered, but in this case also, the driving tool is manually pressed. It is time-consuming and time-consuming to fit the inner ring 5 while holding it concentrically with the shaft 1 and applying a small load perpendicularly to the end face of the inner ring 5, and the unbalanced load on the inner ring 5 often caused the bearing to be damaged.

[0003]

[Problems to be solved by the device]

 This invention solves the above-mentioned conventional problems, and an object thereof is to provide a bearing fitting tool which can be fitted easily in a large diameter portion of a shaft in a short time without damaging the bearing.

[0004]

Means for Solving the Problems A bearing fitting tool of the present invention has a pressing surface facing the end surface of the inner ring of the bearing fitted in the large diameter portion of the shaft at the front end, and has a hammering surface for hitting the rear. A sleeve having a hole that fits into the small diameter portion of the shaft is slidably fitted into the outer cylinder provided at the end, and a handle having a base fixed to the sleeve is attached to the outer cylinder. It is characterized by penetrating the wall and projecting outward.

[0005]

[Action]

 When using the tool of this invention, hold the handle by hand and insert the shaft's small diameter part into the sleeve's hole, then hit the outer cylinder's striking surface with a hammer to make the bearing's inner ring larger in diameter. Fit into the section. The sleeve fits into the small diameter part of the shaft and guides the outer cylinder concentrically with the shaft and in the direction perpendicular to the end surface of the inner ring, so a large eccentric load is applied to the inner ring via the pressing surface. With a few hits with a hammer, the fitting can be done quickly and easily without causing damage due to the inclination of the inner ring.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. In the figure, 1 is a shaft of a knuckle of a front axle of an automobile, and a taper roller bearing (only the inner ring 5 of the bearing for the large diameter portion is shown) fitted in the large diameter portion 2 and the small diameter portion 3 The front wheel hub (not shown) is rotatably supported. Reference numeral 4 denotes a screw portion provided at the shaft end for tightening the nut.

Reference numeral 10 denotes a bearing fitting tool, which is an outer cylinder 11, a sleeve 12 fitted in the outer cylinder 11 with a small clearance so as to be slidable in the axial direction, and the sleeve 12. The handle 14 has a base portion fixed thereto and penetrates an elongated hole 13 formed in a cylinder wall 11a of the outer cylinder 11 and projects outward. The outer cylinder 11 is composed of a bottomed cylindrical body having substantially the same inner diameter dimension as the large diameter portion 2, and 11b is a pressing surface at its front end, which faces the end surface 5a of the inner ring 5. Further, 11c is a striking surface at the rear end of the outer cylinder 11, which is a surface to be hit by the hammer 6.

The sleeve 12 has a hole 15 that fits into the small-diameter portion 3 with a small amount of clearance, and a step 15 a formed at the end of the hole 15 is provided at the end of the small-diameter portion 3. It is adapted to engage with the shoulder portion 3a. The hole 16 following the step 15a of the sleeve 12 is fitted into the threaded portion 4 of the shaft 1 with a clearance larger than the above clearance.

In order to use the bearing fitting tool 10 having the above structure, first, as shown in FIG. 1, the inner ring 5 of the bearing for the large diameter portion is inserted near the large diameter portion 2 of the shaft 1 and then the handle 14 Is gripped by hand and the entire fitting tool is lifted to approach the shaft 1 and the small diameter portion 3 is fitted into the hole 15 of the sleeve 12. Next, when the hammer 6 strikes the striking surface 11c of the outer cylinder 11, the outer cylinder 11 is guided in the direction of the arrow X while being guided by the sleeve 12, and the pressing surface 11b makes the end surface 5a of the inner ring 5 substantially even. Since the inner ring 5 is hit by the hammer 6 smoothly, the inner ring 5 is smoothly hit by the hammer 6 several times, and the state shown in FIG. 3 is obtained. After that, if the handle 14 is gripped and the entire fitting tool is pulled out from the shaft 1 part, one fitting operation is completed in a short time.

The present invention is not limited to the above-described embodiment. For example, the sleeve 12 is a bottomed cylindrical body having only the hole 15 so that its bottom surface is engaged with the end surface 4 a of the screw portion 4. You can In the above embodiment, only the inner ring of the disassembled bearing is fitted to the shaft, but the fitting tool of the present invention can also be used to fit the entire assembled bearing to the shaft. Further, the fitting tool of the present invention can be applied to a tool for fitting a bearing into a large diameter portion of a shaft having a large diameter portion and a small diameter portion other than an axle of an automobile.

[0011]

[Effect of the device]

 As described above, according to the present invention, the sleeve fitted in the small diameter portion of the shaft is used as a guide to slide the outer cylinder, and the annular pressing surface at the tip of the outer cylinder causes the end surface of the inner ring of the bearing to move. Since the bearing is pressed and driven, the bearing can be easily fitted into the large diameter portion of the shaft in a short time without being damaged by an unbalanced load.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a bearing fitting tool during driving of a bearing according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

3 is a longitudinal sectional view showing a bearing fitting completed state of the bearing fitting tool of FIG. 1. FIG.

FIG. 4 is a vertical cross-sectional view showing a conventional bearing driving state.

[Explanation of symbols]

1 ... Shaft, 2 ... Large diameter part, 3 ... Small diameter part, 5 ... Inner ring, 5a ... End surface, 6 ... Hammer, 10 ... Bearing fitting tool, 11 ...
Outer cylinder, 11a ... Cylinder wall, 11b ... Pressing surface, 11c ... Striking surface, 12 ... Sleeve, 13 ... Slot, 14 ... Handle, 1
5 ... hole.

Claims (1)

[Scope of utility model registration request] 1. An outer cylinder having a front surface having a pressing surface facing the end surface of an inner ring of a bearing fitted in a large-diameter portion of the shaft and a rear surface having a striking surface for hammering the shaft. A sleeve having a hole that fits in the diameter portion is slidably fitted, and a handle having a base portion fixed to the sleeve is made to penetrate the cylinder wall portion of the outer cylinder and protrude outward. Characteristic bearing fitting tool.